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118 lines
5.0 KiB
118 lines
5.0 KiB
* BantFlags
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A user script and backend enabling user created flags on [[https://boards.4chan.org/bant][/bant/]],
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originally based on [[https://github.com/flaghunters/Extra-Flags-for-4chan][extraflags]].
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[[https://flags.plum.moe/bantflags.user.js][Install bantflags]]
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** Userscript
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The userscript uses of ~GM_xmlhttpRequest~ to get and post flags with
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the backend . A user's flags are stored between pages using
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~GM_setValue~ and ~GM_getValue~.
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Old versions of GreaseMonkey will be able to recieve updates to the
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script through the ~@updateURL~ and ~@downloadURL~ directives, though
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these were depricated sometime in GreaseMonkey 3.x and updates are
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only checked from the location the script was downloaded from so be
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careful where you upload links.
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On self hosting, changing ~back_end~ to your domain /should/ be all
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you need to do, but don't take this as fact. I haven't tested the
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example nginx config.
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The userscript has been designed specifically to target ECMAScript
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2015 (ES6), making liberal use of arrow functions, and const/let
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declarations. Update your hecking browser.
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** Backend
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*** Prerequisites
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- .NET Core 3.1
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- MariaDB / MySQL
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*** .NET dependancies
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- Nito.AsyncEX
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- Newtonsoft.Json
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- MySql.Data
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- Microsoft.AspNetCore.Mvc.NewtonsoftJson
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- Microsoft.AspNetCore.StaticFiles
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- Microsoft.AspNetCore.Razor
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- Microsoft.EntityFrameworkCore.SqlServer
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- Microsoft.EntityFrameworkCore.Tools
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- Magick.NET-Q8-AnyCPU
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*** Setup
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1) [[https://dotnet.microsoft.com/download/dotnet-core][Install .NET Core]]
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2) Clone and build the BantFlags solution.
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3) Create the database using [[https://github.com/C-xC-c/BantFlags/blob/master/Environment/database.sql][database.sql]].
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- *Change the password*.
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4) configure ~BantFlags/appsettings.example.json~ with your connection
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string and webroot (where you'll serve the flags from *without a
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trailing slash*) and rename it to ~appsettings.json~
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- [[./BantFlags/appsettings.example.json][example appsettings.json]]
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- ASP.NET Core applications look for a folder called ~wwwroot~ in
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the same directory as the application for static files. However
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you can choose to logically seperate these by providing a vaild
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directory to ~webroot~.
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- That is to say, if the bantflags application is in ~/var/www/bantflags/BantFlags.dll~, the program will look for
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the folder ~/var/www/bantflags/wwwroot/~ to host static content,
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or whatever directory is provided to ~wwwroot~.
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5) If you're hosting on your GNU/Linux distribution of choice, Create a
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folder called ~keys~ in the same directory as the bantflags
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executable.
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- E.G. ~/var/www/bantflags/keys/~
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- This is because ASP.NET Core uses some cryptic bullshit anti
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forgery token when processing HTML forms, and it's unable to
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persistantly store the decryption keys in memory on
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GNU/Linux. This directory will store said keys when you or
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users upload flags to /upload. The path uses ~AppDomain.CurrentDomain.BaseDirectory~ internally,
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I.E. wherever the program is.
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6) Add flags to the backend by uploading them to the flag console (/Upload).
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- Flags must be 16x11 pixels and under 15kb. Their names must not
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exceed 100 characters and cannot contain either "||" or ",".
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7) Configure your webserver of choice to forward requests to kestral
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- [[https://github.com/C-xC-c/BantFlags/blob/master/Environment/nginx.conf][Example nginx config.]]
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8) Run with ~dotnet BantFlags.dll~ or create a service to run it as a
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daemon.
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- [[https://github.com/C-xC-c/BantFlags/blob/master/Environment/bantflags.service][Example systemd service.]]
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9) ???
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10) profit.
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*** Database
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Tables look like this:
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*posts*
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| id | post_nr | board |
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| 1 | 12345 | bant |
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| 2 | 56789 | bant |
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*flags*
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| id | flag |
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| 1 | patchouli |
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| 2 | chen |
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*postflags*
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| id | post_nr | flag |
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| 1 | 1 | 1 |
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| 2 | 1 | 2 |
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| 2 | 2 | 2 |
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where ~post_nr~ and ~flag~ in *postflags* are the id fields in their
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respective tables.
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*** API
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The backend exposes three endpoints for the userscript to get and post
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flags. Flags themselves are hosted from the ~flags/~ directory. This
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will be whatever value you gave to ~webroot~ (or
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~/path/to/bantflags/wwwroot/~ if no value is provided) + ~flags/~.
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| route | purpse |
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|------------+--------------------------------------------|
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| /api/get | Get flags using post numbers in the thread |
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| /api/post | Add flags to the database |
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| /api/flags | List the flags we support |
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| /flags/* | The flag images |
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** Backwards Compatibility
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The API is 1:1 compatable with all previous versions of
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bantflags. Further improvements are achieved by encoding a ~version~
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variable when poking endpoints which allows for breaking changes in
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the script and backend while guaranteeing data can be parsed on both
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ends. See [[https://github.com/C-xC-c/BantFlags/tree/master/Docs/][Docs/{endpoint}]] for changes and compatibility.
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